Notorious for marching to the beat of his own drummer, Lynch has already retired once from the NFL. Can the team count on a total commitment for the final season of a two-year contract signed last April?
Responding to the fan's contention that Lynch didn't round into football shape until November of last season, Gruden responded, "We're not going to have that."
"No. I said to him: 'I need Marshawn Lynch. I don't need this part-time Lynch. I need full-time Lynch,'" Gruden said, recounting the details of his meeting with Lynch earlier that day.
"We need the real deal," Gruden continued. "If you're going to put those letters on the back of your jersey, man, you've got to back it up, Marshawn -- right? We don't need another back, we need a feature back."
It's rare to capture an NFL head coach -- especially one with a reputation for embellishment on par with Gruden's -- with his guard down in such a candid moment.
Knocking the rust off after a year off from football, Lynch was plagued by bouts of inconsistency in his return to the gridiron.
After averaging a disappointing 10.8 carries and 40.4 rushing yards prior to Oakland's Week 10 bye, a resurgent Lynch saw a dramatic uptick in effectiveness over the final seven games, increasing those numbers to 17.3 rushes and 81.1 yards down the stretch.
Whether the slow start was a byproduct of an aging power back's suboptimal conditioning, reflective of the Raiders' play calling and game scripts, or a combination thereof, Gruden clearly wants a deeper commitment from Lynch.
Returning to the sidelines with the fervor of the freshly converted, Gruden is preaching a firebrand football philosophy in 2018.
"If you're faking it, the football gods will get you," Gruden testified, via Price. "They reward the guys who work hard. That's why Tom Brady is where he is. If you're focused and determined and legit, good things will happen. I believe that."
Will Gruden and Lynch see eye-to-eye on that level of focus and determination? If not, the Raiders will be in the market for a new feature back.